Service Keeps Dropping Out Randomly - Xiaomi Mi MIX Questions & Answers

Hi All,
I got my Mix from the Shanghai store and am currently in the Netherlands with a Dutch vodafone SIM.
Most of the time, everything works perfectly, but sometimes the phone just loses connectivity completely (no data, no calls, no sms). This happened both in Shanghai and in the Netherlands. If I go into APN settings, play around with a few options (switch protocol from ipv4 to 6 and back again) it will start working again eventually.
At first I thought it was just a roaming related issue, but it keeps happening everywhere. I don't think it's the SIM because it works perfectly on my last phone (an s6 edge from Hong Kong).
Is this a known issue? Do I have a defective unit? Should I get a new sim? Flash a ROM? Many thanks,
J

Related

dropped calls

Does anyone have the same problems with the breeze that when you make a call it can drop it with no warning show "No service" and suddenly get it back straight away?
i have radio 1.38 installed, using a ORange UK 3G PAYG sim in a full coverage 2G area and 1-2 bars 3G area.
i have tried to set the thing to GSM only and 3G only but this doesn't solve it. has anyone......anyone out there figured a way to sort this?
or does anyone know of the possibility of getting a replacement from HTC that works?
cheers to anyone who can help
Dan
Same problem here, with Orange also, although on contract with them.
Please let me know if you find a solution. I emailed HTC, which I already know you have done, and you have had a replacement handset. This is not a good start for me
I had the best luck with my Sony Ericsson K610i. It was the best 3G Bluetooth Modem ever.. shame no Exchange ActiveSync/DirectPush
I have exactly same problem. Phone calls are dropped with no services message. And I have to restart phone at least once a week because my phone will fail to find any network. After reboot it works fine for a while. I have latest firmware with 1.38 radio. Phone is from O2 CZ.
Hi guys,
did you try to switch from 2G and 3G connection to 2G only? I assume this problem is caused by the network coverage while the Breeze is switching from 3G to 2G and vice versa. Me and some friends (Vodafone and T-Mobil) didn't discover these kind of problems.....
Cheers
Michael
Yes, I did it. But I still have to restart phone every week because phone lost signal.
I'm thinking about to flashing newer radio.
Hmm, we are using this version: "MTeoR_Upgrade_1.34.251.1_1.38.00.10_EUR_SHIP.exe" and it works well......

vario 3 not receiving half the calls, any ideas??

Hi guys,
Tried searching for a similar problem but didn't find anything.
I have had it changed twice now, so it could be a problem with the current software.
I am finding that I am missing most of my calls, and they are going straight through to voicemail, despite having full reception.
This is not happening with the Sim card in any other phone, just with the Vario 3.
This is a T- Mobile UK handset
has anyone had a similar problem? I'm thinking if they are just replacing it again then I may have to try a different handset.
It's very disruptive for work and social purposes when callers are getting straight to voicemail most of the time.
Any ideas are greatly appreciated
thanks.
Hi, The problem may be with the 3G network, I had a similar problem and was told to change the network settings to standard GPRS settings through the network settings menu on the vario iii.
This did solve the problem of calls not coming through. I changed settings back to 3G a couple of days later and all seemed to be working again.
I think that the problem lies with the 3G network as I was advised by someone I know who works for T-mobile UK that T-mobile are still experimenting with 3G and certain areas may work better than other areas due to problems with the network at certain times.
Were the other phones that you used your sim in on 3g or standard gprs settings?
HasC said:
Hi, The problem may be with the 3G network, I had a similar problem and was told to change the network settings to standard GPRS settings through the network settings menu on the vario iii.
This did solve the problem of calls not coming through. I changed settings back to 3G a couple of days later and all seemed to be working again.
I think that the problem lies with the 3G network as I was advised by someone I know who works for T-mobile UK that T-mobile are still experimenting with 3G and certain areas may work better than other areas due to problems with the network at certain times.
Were the other phones that you used your sim in on 3g or standard gprs settings?
Click to expand...
Click to collapse
Thanks for the response.
I have put it on GPRS which seems to have helped.
It's just defeating the purpose of web and walk.
My previous phone was the vario 2 which to my memory worked fine, although I did put the latest radio version etc on it via this site.
They are sending a repair bag for me to post over to them the handset, but I imagine they don't have any updated software to stick on it or radio.

3G not working

I'm having major trouble with my phone and need some help.
I've got a standard Vario III no flashed roms etc..
When I'm on standard GPRS network the phone works fine, calls internet etc..
However whenever it switches to a 3G or H network I cant make or receive calls or use the internet. The funny thing is that when it tries to access the internet it looks like it connects but when you click on the 3G (with the arrows) it says there are no sessions active.
Help!!
yes.. i have the same problem too
so we must switch the band using gsm to get phone works normally. if we set AUTO it will failed to make call or to receive call.
another kaiser from my friend was normally in same area. please help us.. thanks
maybe I have the same problem, I can't make calls, when I make a call it do a sound alert and end the communication.
The line is ok, I was using it with other phone without problems. I spend today 5 hours with the mobile service provider (CLARO ARGENTINA) tech service and they finally say this must be a problem with the pda, not with the service (after testing all possible alternatives)
The phone is almost new! I can connect to EDGE and navigate the internet, H or 3G appear "some times" but it get EDGE 99% of the time.
When somebody call me the phone ring and then then lost connection. When people call me they receive a "network error".
1 of 20 times I CAN do a call.
Do you think is the phone? or there is some update ? I'm downloading a 6.1 rom to test with it.
it is not the phone. Assuming your are using T-Mobile, Edge network coverage is almost 100% complete, while T-Mobile's 3G network is in the early stages. So you will usually get Edge until 3G is nearing completion - T-Mobile is slow
Here is an article: http://www.boygeniusreport.com/2008/05/05/t-mobiles-3g-rollout/
Well I use Claro AR (in Argentina). EDGE is 100% and 3G is quite well in my city, but what do you think about my phone calls are closed after 5/6 seconds with error and then it lose phone coverage. Never happened with other phone, same provider, same line, other phone.
Now I have updated to a duttys Rom with a newer radio version (1.65.x, my phone comes with 1.21.x) and still happening. Now I will test another rom
It IS the phone.
If you do a search on this board lots of people are having that problem, as I found when encountering it myself. It's a hardware fault in the radio part, that requires sending the device back to HTC. They actually replace the whole mainboard to cure it, so it's a serious issue.
Awaiting to receive mine back, it's been there for a month now
Here's a large thread about it: http://forum.xda-developers.com/showthread.php?t=335074
thank you
I force the phone to run under GSM network (not WCDMA) and the phone works perfect, internet too (only EDGE). But I can't use 3G because if I set it to WCDMA or AUTO in the phone network section, it's unusable.
That's the one. I'm receiving my Kaiser back from repair tomorrow, can't wait, and hope it will be fine this time... It's been at the service center for 6 weeks now
hello, any news ?
Yep, received it back like 3 weeks ago, everything works flawlessly. They replaced the whole mainboard just like for the other people with the same issue.
Ok I'm dead. Sending the devide to north america from Argentina? now way.
Why? I had to send it to the UK, not much of a problem...
and it back again to you? awesome!! not easy in latin america!
Ok I will call tomorrow the seller to ask the guarantee. let's see what happen.

[Q] Help! D5803 on AT&T - not receiving text messages or calls

My new xperia z3 compact (D5803) receives text messages and calls very intermittently. I'm on AT&T US, stock firmware.
- If I am using the phone (or have very recently used the phone, say within 30 seconds) then most calls and text messages come through fine (though not always).
- If I leave the phone alone for more than a few minutes, text messages or calls almost never come through - though occasionally I get a text message many hours after it was sent.
- If someone leaves a voicemail (because I didn't answer the phone, because the phone didn't ring!), I don't get a notification until I open the voicemail app and manually sync.
- I can make a phone call or send a text message with no problems (texts arrive immediately).
I don't have any of these problems when I put my SIM back into my HTC One M8.
I've tried the following to fix this:
- I went to the AT&T store and had them give me a new nano SIM. It made no difference; same issues.
- I factory reset my phone. It made no difference; same issues.
- I updated to the US version of the firmware. It made no difference; same issues.
- I put the SIM into a second, until that point unused, xperia z3. It made no difference; same issues.
Given that I have exactly the same issues after changing both the SIM and the phone, I can only think it must be some kind of compatibility issue with using AT&T on this phone - except I see that many other users of this forum are on AT&T and aren't having the same problems.
I do notice that I don't have the best signal in my house (usually 1-2 bars) so I'm wondering if maybe that could be related? As I say though, my HTC One works fine, as do all of the other AT&T phones in my house.
I think my next step will be to go and buy a T-Mobile prepaid SIM, just to see if that works, but does anyone have any thoughts or suggestions? All in all this is getting pretty frustrating, because I LOVE the phone, but right now it's unusable for me.
I would suggest reading this thread below. It should give you some tips on how to resolve your issue.
http://forum.xda-developers.com/z3-compact/help/att-apn-settings-lte-t2888644
Thank you for trying to help!
I probably should have added that link as one of the things I had already tried. To be specific, my APN settings are:
Name ATT Phone
APN phone
Proxy Not set
Port Not set
Username Not set
Password Not set
Server Not set
MMSC http: //mmsc.mobile.att.net
MMS proxy proxy.mobile.att.net
MMS port 80
MCC 310
MNC 410
Authentication Type None
APN type default,mms,supl,hipri
APN protocol IPv4
Bearer Unspecified
---------------------------------
I'm beginning to think it *must* be a signal issue, even though all the other phones in my house are fine. I have the "Advanced Signal Status" app installed, but I'm not sure what I should be looking for to see if there's anything fishy
Don't forget to download the Internet and MMS settings for your phone. You go into Settings > Wireless & Networks > More > Internet settings and download settings for Internet and MMS
Thanks again for the suggestions.
Sadly, it's still not working. I'm pretty sure I had already downloaded those settings, but I did it again anyway (seems you can just download over and over). I even reset the phone after that just to be sure, but the problem persists.
I have the same issue and I live in Sweden....
Im having the same issues. I restart the device and then come all the missed calls and missed txt messages.. i really hope theres a easy fix to this soon.
So, I switched my SIM from AT&T to T-Mobile and it fixed my issues. It seems that the either the poor AT&T reception in my house or some other strange incompatibility between the phone and AT&T was the problem.
Either way there's obviously some kind of issue with this phone - my guess is that when connectivity with the network is poor, the phone maybe times-out and gives up. Perhaps Sony will fix this with a firmware update at some point. In the mean time I would suggest that other folks having this issue maybe go to a part of town where they know reception is very good and see if the problems happen there.
So after 2 days of of testing, a new nano sim card and several phone calls to ATT I found temporary fix. Change your Network mode to WCDMA (preffered)/GSM. While this wont give you LTE it will prevent the missed phone calls and txt messages and at least you have HSPA+ . The problem is the LTE connection to ATT. The connection either drops and or prevents phone calls /texts from coming through the lower HSPA + or 2g bands... Not sure why this is. Hoping that when the Sony Store models start shipping on Nov 2nd they have the same issue and Sony will send out an update to fix the connection issue.
I'm on the US ATT network with the same problem as well. After trouble shooting I have come to agree with you. I'm really hoping Sony sends out an update.
Is this a problem on Tmobile USA with Z3 Compact also?
same issues!
I have two Z3 compacts (US version purchased direct from Sony) on my family plan with the same issues of not receiving SMS or calls when connected to wi-fi, and occasionally cannot receive SMS or calls when not connected to wi-fi either. I am always able to send texts and calls, and MMS/LTE always work (I am usually e-mailed when my phone isn't working and I get that right away). Whenever the phones aren't receiving calls, it rings once and goes to voicemail, which tips us off that the phones aren't working.
If you are also getting this problem, please get on AT&T chat and ask them to escalate/forward to their manager. We've got to get their attention. Additionally, I was told that "Okay so since the phone is unlocked our service is not guaranteed to work at full capacity, also I can not submit a case due to it is not an at&t phone. "
Yep - Same problem over here. AT&T in Northeast USA.
AT&T tried everything they could (resettings connection, etc) but again also said that it isn't guaranteed to work because it's an unlocked device.
I'm doing a system repair on the phone from the sony desktop application. Hoping it will fix, but not hopeful. Now sony says they want to have my phone in for testing. :/
I'm hoping they realize soon that this is a bug, and not a case of a broken phone.
Same problem here on cricket (AT&T) in Houston. Just disabled LTE. We'll see if that fixes it like it did for the other guy. Sony needs to get on this.
Sent from my Nexus 5
Not working MMS
Yep I have tried all of the above solutions and nothing is working. Changed APN multiple times, factory reset, switched SIM, called att, went into the store.
Like above, ATT came to the conclusion that unlocked phones are sometimes not compatible with their service and there's only so much trouble shooting they can do.
I have ATT in san francisco, and it's looking like I'm going to return the Xperia z3c. Shame it's a great phone besides the MMS issue.
aaronv20 said:
So after 2 days of of testing, a new nano sim card and several phone calls to ATT I found temporary fix. Change your Network mode to WCDMA (preffered)/GSM. While this wont give you LTE it will prevent the missed phone calls and txt messages and at least you have HSPA+ . The problem is the LTE connection to ATT. The connection either drops and or prevents phone calls /texts from coming through the lower HSPA + or 2g bands... Not sure why this is. Hoping that when the Sony Store models start shipping on Nov 2nd they have the same issue and Sony will send out an update to fix the connection issue.
Click to expand...
Click to collapse
Confirmed that this worked on my wife's z3c. She wont miss the LTE anyway since she is always near wifi and when she isn't 3G is definitely good enough. We streamed spotify for an hour today on country roads on her phone on 3G. No issues.
Sent from my Nexus 5
sorry to hear you guys are having such issues...
My z3 compact on att works flawlessly. I swapped my nano sim from a iphone 6 i was trying out straight into this.
Att did mention something about some settings they had to flip in the back end when i switched over to a nano sim from the sim i was using in my lg g3. If you guys loose all hope have a buddy with an iphone on att and use his imei and let att configure the sim for that phone then swap the sim into the z3...could work because i know it does for me
Same issues here. I have a new D5803 on Straight Talk (AT&T). I live in the mid Atlantic. It seems I don't receive calls/texts when I have 2 bars or less. Not sure about LTE vs. HSPA. I always have Wifi on so not sure if turning it off would make a difference. THIS IS A HUGE ISSUE! Hopefully a firmware update will save us. Has anyone contacted Sony?
mtilson said:
Same issues here. I have a new D5803 on Straight Talk (AT&T). I live in the mid Atlantic. It seems I don't receive calls/texts when I have 2 bars or less. Not sure about LTE vs. HSPA. I always have Wifi on so not sure if turning it off would make a difference. THIS IS A HUGE ISSUE! Hopefully a firmware update will save us. Has anyone contacted Sony?
Click to expand...
Click to collapse
Yes it does make a difference. Turn it off and everything should work.
Sent from my Nexus 5
sublimnl said:
Yes it does make a difference. Turn it off and everything should work.
Sent from my Nexus 5
Click to expand...
Click to collapse
Thanks for the info, but this isn't a viable solution! I shouldn't have to keep Wifi off to ensure I receive my calls/texts!

Roaming stopped working (No signal when leaving the borders) - after EMUI 12 ?!

Hi guys,
I have the P30 Pro since it was released and so far never had issues when traveling (from Germany) to other countries (mostly within Europe).
Last time it (voice and data) worked fine was this year in January when I went to Switzerland.
In April however I did not even get a signal (only emergency calls).
My provider confirmed there are no restrictions and nothing has changed.
The only thing that changed was the pushed EMUI 12 Update end of March...
I checked all roaming and apn settings, switched the sim card to another slot, rebooted, etc. Nothing helped.
Once I leave the German border only emergency calls are available. Coming back to Germany everything works fine again.
I was wondering if I'm the only one here with that problem and, in any case, how it can be fixed?
Will bring another phone on my next trip for further testing.
Thanks for you help!
Is 'Network provider' in network settings set to automatic?
Yes it`s set to automatic, I did not try changing it when I was abroad. Trying it right now it lists other providers but I can't connect to those.
Tried the same thing on the company phone (Samsung) with the same result.
Should be automatic, so looks correct. I would try another SIM (new number), if behaves the same way.

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